Lamp



FIG. 1 is a perspective view of a lamp illustrating our new design;

FIG. 2 is an elevational view thereof;

FIG. 3 is a top view thereof; and

FIG. 4 is a bottom view thereof.

In all of the foregoing drawings, stipling is intended to illustrate shape and contour; such stipling is not intended to illustrate surface characteristics. 

The ornamental design for a lamp, substantially as shown and described. 